21211000102211 has 32 divisors (see below), whose sum is σ = 21750827911488. Its totient is φ = 20678215703040.

The previous prime is 21211000102207. The next prime is 21211000102213. The reversal of 21211000102211 is 11220100011212.

It is a cyclic number.

It is not a de Polignac number, because 21211000102211 - 2² = 21211000102207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211000102213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9250325981 + ... + 9250328273.

It is an arithmetic number, because the mean of its divisors is an integer number (679713372234).

Almost surely, 2^{21211000102211} is an apocalyptic number.

21211000102211 is a deficient number, since it is larger than the sum of its proper divisors (539827809277).

21211000102211 is a wasteful number, since it uses less digits than its factorization.

21211000102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211000102211 its reverse (11220100011212), we get a palindrome (32431100113423).

Subtracting from 21211000102211 its reverse (11220100011212), we obtain a palindrome (9990900090999).

The spelling of 21211000102211 in words is "twenty-one trillion, two hundred eleven billion, one hundred two thousand, two hundred eleven".